denial vs naysaying

denial and naysaying both are nouns.

Word	Noun	Adjective	Verb	Adverb
denial	Yes	No	No	No
naysaying	Yes	No	No	No

As nouns, naysaying is a hyponym of denial; that is, naysaying is a word with a more specific, narrower meaning than denial:

Other hyponyms of denial include abnegation, negative, refusal, disavowal, disclaimer.

denial (noun)	naysaying (noun)
a defendant's answer or plea denying the truth of the charges against him	the act of saying no to a request
renunciation of your own interests in favor of the interests of others
the act of refusing to comply (as with a request)
the act of asserting that something alleged is not true
(psychiatry) a defense mechanism that denies painful thoughts